Road grader



Ma 12, 1942. F. E. ARNDT 2,282,752

ROAD GRADER Original Filed Feb. 2, 1933 Ismaehtor Qtforneg Patented May 12, 1942 ROAD GRADER Franklin E. Arndt, Galion,

Ohio, assignor to The Galion Iron Works & Manufacturing Company, a corporation of Ohio Original application February 2, 1933, Serial No.

654,901. Divided an 1938, Serial No.

1 Claim.

My invention relates to road building apparatus and one of its objects is the provision of improved and elficient fluid-pressure motor-operated mechanism for effecting various adjustments in a road grading machine to prevent lateral skidding thereof during operation.

A further object of the invention is the provision of improved fluid-pressure motor-operated mechanism for effecting the leaning of wheels in a road grading machine in co-operation with the steering thereof.

Other objects of the invention will appear hereinafter, the novel features and combinations being set forth in the appended claim.

This application is a division of my co-pending application, Serial No. 654,901, filed February 2, 1933, for an improvement in road graders, on which was granted on July 1, 1941, Patent No. 2,247,464.

In the accompanying drawing,

Fig. 1 is a rear elevation of a road grading machine embodying my improvements; and

Fig. 2 is an elevational view, partly in section, looking toward the rear, this view showing in elevation the front steering unit of the said road grading machine.

The machine shown in Figs. 1 and 2 comprises the vehicle frame mounted on the front wheels l2, l2 and the rear Wheels l3, l3. The front and rear wheels are preferably of metal comprising radial spokes and circular rims having circular edges on opposite sides adapted to dig into the ground when leaned as hereinafter more fully described. The vehicle frame comprises longitudinally spaced-apart beams I 4, l4 which are rigidly connected together.

As shown in Fig. 2, the forward ends of the beams l4, l4 are connected by a U-shaped yoke I9 which rests upon a steerable supporting frame or bolster 20 having depending channel irons 2 I, 2| secured at their lower ends to the axle-tree 22 to the ends of which are pivoted at 23, 23 the axles for the front wheels l2, l2. These axles are provided with vertical arms 24, 24 to the upper ends of which is pivoted the cross-piece 25. Between one of the channel irons 2| and one of the arms 24 is pivotally connected a hydraulic motor comprising a cylinder 26 and a piston rod 21. The'rear end of the cylinder 26 is pivoted at 26' to the left-hand inclined brace 2|, and the outer end of the piston rod 2! is pivoted at 28 to the upper end of the upright arm 24.

As hereinafter explained, the hydraulic motor comprising the cylinder 26 is double acting in that the liquid flows into and out of the cylinder d this application June 18,

on both sides of the piston therein, as indicated by the ports 64', 65' in Fig. 2, and therefore when the leaning of the wheels I2 is adjusted, they may be locked in adjusted position by closing the valve controlling the flow of the liquid through the ports 64' and 65' into and out of the cylinder 26.

Secured rigidly to the rear ends of the longitudinal beams I4 is a cross supporting structure comprising angle irons 83, 83 (Fig, 1). Guides are provided for the transverse members 81, for the rear wheel supporting frame. The axles for the rear wheels I3, l3 are pivoted at 89, 89 to the ends of the frame 81 (Fig. 1). Secured to the rear wheel axels are vertical crank arms 90, 90, the upper ends of which are pivoted at 91, 9| to the crosspiece 92.

A vertical bracket plate 93 is secured to the frame 8'! and to its upper end at 94 is pivoted a cylinder 95 of a hydraulic motor comprising a piston rod 96 of the outer end of which is pivoted at 9| to the upper end of the crank arm at the left-hand side of the machine, as viewed from the rear (Fig. 1). The hydraulic motor comprising the cylinder is double acting in that the liquid flows to and from the cylinder 95 on both sides of the piston therein, and the controlling valve is such that when it is closed, the crank arms 99, 90 will be locked in adjusted positions. The leaning of the rear Wheels may therefore be adjusted by means of the hydraulic motor comprising the cylinder 95, and locked in adjusted position.

Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit and scope of the invention as defined by the claim hereto appended, and I therefore wish not to be restricted to, the precise construction herein disclosed.

Having thus described and shown an embodiment of my invention, what I desire to secure by Letters Patent of the United States is:

In a device of the class described, the combination with an axletree for a vehicle, of axles pivoted to said axletree on parallel axes, wheels journaled on said axles, parallel motion. mechanism connecting said axles, and a reciprocating fluid-pressure motor pivotally connected at one end to said axletree and at its other end to said parallel motion mechanism to efiect adjustment of the leaning of said wheels by movement of said axles on their pivotal connections to said axletree.

FRANKLIN E. ARNDT. 

